My garage has a GFCI that protects all the outlets. I've owned my Volt for almost a year now and have only had one nuisance trip. Small current leaks are usually what cause nuisance trips. A nearly bare hot wire can ever so slightly leak current into a nearby grounded surface. Faulty equipment can also trip GFCI's. Your EVSE and charge controller would be suspect since they handle AC power. I had PC power supply that would very reliably trip my basement GFCI when it was in contact with my wooden work bench.